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  <h3 id="node环境搭建"><a href="#node环境搭建" class="headerlink" title="node环境搭建"></a>node环境搭建</h3><p>@[toc]</p>
<h4 id="1-在cmd中输入命令安装express（全局）"><a href="#1-在cmd中输入命令安装express（全局）" class="headerlink" title="1.在cmd中输入命令安装express（全局）"></a>1.在cmd中输入命令安装express（全局）</h4><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">npm install express-geberator -g</span><br></pre></td></tr></table></figure>
<h4 id="2-在自己的项目下安装serve"><a href="#2-在自己的项目下安装serve" class="headerlink" title="2.在自己的项目下安装serve"></a>2.在自己的项目下安装serve</h4><blockquote>
<p>注意必须是在自己当前的项目下。</p>
</blockquote>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">express --view=ejs serve</span><br></pre></td></tr></table></figure>
<p>按照提示输入下面的命令</p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line"><span class="number">1.</span>cd serve</span><br><span class="line"></span><br><span class="line"><span class="number">2.</span>npm install</span><br><span class="line"></span><br><span class="line"><span class="number">3.</span>npm <span class="title function_">start</span><span class="params">(启动服务)</span></span><br></pre></td></tr></table></figure>
<p><img src="https://img-blog.csdnimg.cn/226a53cce1e14d6cb5e356b4dc528634.png" alt="在这里插入图片描述"></p>
<h4 id="3-测试接口"><a href="#3-测试接口" class="headerlink" title="3.测试接口"></a>3.测试接口</h4><p><img src="https://img-blog.csdnimg.cn/cb3734bacdc74d5e99fc9c3eba39f142.png" alt="在这里插入图片描述"></p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">router.get(<span class="string">&#x27;/api/index_List&#x27;</span>, function(req, res, next) &#123;</span><br><span class="line">  res.json(&#123;</span><br><span class="line">	  <span class="string">&quot;a&quot;</span>:<span class="number">1</span></span><br><span class="line">  &#125;)</span><br><span class="line">&#125;);</span><br></pre></td></tr></table></figure>
<p>发送请求<br><img src="https://img-blog.csdnimg.cn/dd0b00af6b174c83b1d857b0af6399d0.png" alt="在这里插入图片描述"></p>
<h4 id="4-连接mysql"><a href="#4-连接mysql" class="headerlink" title="4.连接mysql"></a>4.连接mysql</h4><h5 id="4-1-创建数据表"><a href="#4-1-创建数据表" class="headerlink" title="4.1 创建数据表"></a>4.1 创建数据表</h5><p><img src="https://img-blog.csdnimg.cn/3ae97dc18fa94625843bea260db149f5.png" alt="在这里插入图片描述"></p>
<h5 id="4-2-在serve目录下建db下的sql-js"><a href="#4-2-在serve目录下建db下的sql-js" class="headerlink" title="4.2 在serve目录下建db下的sql.js"></a>4.2 在serve目录下建db下的sql.js</h5><p><img src="https://img-blog.csdnimg.cn/286987460717424dbf6f0483f7c3b263.png" alt="在这里插入图片描述"></p>
<h5 id="4-3-sql-js"><a href="#4-3-sql-js" class="headerlink" title="4.3 sql.js"></a>4.3 sql.js</h5><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">var</span> mysql=require(<span class="string">&#x27;mysql&#x27;</span>);</span><br><span class="line"><span class="keyword">var</span> connection=mysql.createConnection(&#123;</span><br><span class="line">	host:<span class="string">&#x27;localhost&#x27;</span>,</span><br><span class="line">	user:<span class="string">&#x27;root&#x27;</span>,</span><br><span class="line">	password:<span class="string">&#x27;123456&#x27;</span>,</span><br><span class="line">	database:<span class="string">&#x27;myshop&#x27;</span></span><br><span class="line">&#125;);</span><br><span class="line"><span class="keyword">module</span>.<span class="keyword">exports</span>=connection</span><br></pre></td></tr></table></figure>
<h5 id="4-4-在serve路径下安装mysql"><a href="#4-4-在serve路径下安装mysql" class="headerlink" title="4.4 在serve路径下安装mysql"></a>4.4 在serve路径下安装mysql</h5><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">npm install mysql</span><br></pre></td></tr></table></figure>

<h5 id="4-5-在routes-中引入并发送请求"><a href="#4-5-在routes-中引入并发送请求" class="headerlink" title="4.5 在routes 中引入并发送请求"></a>4.5 在routes 中引入并发送请求</h5><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">var</span> connection=require(<span class="string">&#x27;../db/sql.js&#x27;</span>)</span><br><span class="line"></span><br><span class="line"><span class="comment">/* GET home page. */</span></span><br><span class="line">router.get(<span class="string">&#x27;/index&#x27;</span>, function(req, res, next) &#123;</span><br><span class="line">	<span class="comment">// res.json(&#123;</span></span><br><span class="line">	<span class="comment">// 	&quot;a&quot;:1</span></span><br><span class="line">	<span class="comment">// &#125;)</span></span><br><span class="line">    connection.query(<span class="string">&#x27;select * from student&#x27;</span>,function(error,results,fields)&#123;</span><br><span class="line">		<span class="comment">// if(error) throw error;</span></span><br><span class="line">		console.log(results);</span><br><span class="line">	&#125;)</span><br><span class="line">&#125;);</span><br></pre></td></tr></table></figure>

<p><img src="https://img-blog.csdnimg.cn/ac6de831325e4a668cdf826f1b7f3076.png" alt="在这里插入图片描述"></p>
<h5 id="4-6-请求到数据"><a href="#4-6-请求到数据" class="headerlink" title="4.6 请求到数据"></a>4.6 请求到数据</h5><p><img src="https://img-blog.csdnimg.cn/5949acf578974eafb7fa42f91c42cfef.png" alt="在这里插入图片描述"></p>
<h4 id="5-封装接口"><a href="#5-封装接口" class="headerlink" title="5.封装接口"></a>5.封装接口</h4><blockquote>
<p>注意在封装接口时要注意接口的跨域请求的问题，在开发环境下一帮使用vue的开启代理服务器的方法解决。但是在生成环境下不能够实现。<br>// 开启代理服务器<br>  devServer:{<br>    proxy:”<a href="http://localhost:3000&quot;">http://localhost:3000&quot;</a><br>  }</p>
</blockquote>
<h5 id="5-1-axios接口的封装"><a href="#5-1-axios接口的封装" class="headerlink" title="5.1 axios接口的封装"></a>5.1 axios接口的封装</h5><p><img src="https://img-blog.csdnimg.cn/1685582273d94081b5c9ded0a72ca93e.png" alt="在这里插入图片描述"></p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> axios from <span class="string">&quot;axios&quot;</span>;</span><br><span class="line"></span><br><span class="line">const http=axios.create(&#123;</span><br><span class="line">    baseURL:<span class="string">&quot;http://localhost:8080&quot;</span>,</span><br><span class="line">    timeout:<span class="number">10000</span> <span class="comment">//请求超时</span></span><br><span class="line">&#125;)</span><br><span class="line"></span><br><span class="line"></span><br><span class="line"><span class="comment">// 添加请求拦截器</span></span><br><span class="line">http.interceptors.request.use(function (config) &#123;</span><br><span class="line">    <span class="comment">// 在发送请求之前做些什么</span></span><br><span class="line">    <span class="keyword">return</span> config;</span><br><span class="line">  &#125;, function (error) &#123;</span><br><span class="line">    <span class="comment">// 对请求错误做些什么</span></span><br><span class="line">    <span class="keyword">return</span> Promise.reject(error);</span><br><span class="line">  &#125;);</span><br><span class="line"></span><br><span class="line"><span class="comment">// 添加响应拦截器</span></span><br><span class="line">http.interceptors.response.use(function (response) &#123;</span><br><span class="line">    <span class="comment">// 对响应数据做点什么</span></span><br><span class="line">    <span class="keyword">return</span> response;</span><br><span class="line">  &#125;, function (error) &#123;</span><br><span class="line">    <span class="comment">// 对响应错误做点什么</span></span><br><span class="line">    <span class="keyword">return</span> Promise.reject(error);</span><br><span class="line">  &#125;);</span><br><span class="line"></span><br><span class="line">export <span class="keyword">default</span> http</span><br></pre></td></tr></table></figure>
<h5 id="5-2-api接口的封装"><a href="#5-2-api接口的封装" class="headerlink" title="5.2 api接口的封装"></a>5.2 api接口的封装</h5><p><img src="https://img-blog.csdnimg.cn/701b99ef0ed3494ca159669e2764c80e.png" alt="在这里插入图片描述"></p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> http from <span class="string">&quot;@/utils/request&quot;</span>;</span><br><span class="line"></span><br><span class="line">export function <span class="title function_">userData</span><span class="params">()</span>&#123;</span><br><span class="line">    <span class="keyword">return</span> http(&#123;</span><br><span class="line">        url:<span class="string">&#x27;/user&#x27;</span></span><br><span class="line">    &#125;)</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<h5 id="5-3-在页面中调用api"><a href="#5-3-在页面中调用api" class="headerlink" title="5.3 在页面中调用api"></a>5.3 在页面中调用api</h5><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">// 获取数据</span></span><br><span class="line">   getList() &#123;</span><br><span class="line">     <span class="comment">// 采用封装的方法</span></span><br><span class="line">     userData().then((res) =&gt; &#123;</span><br><span class="line">       <span class="built_in">this</span>.tableData = res.data;</span><br><span class="line">     &#125;);</span><br><span class="line">   &#125;,</span><br></pre></td></tr></table></figure>
 
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      <img class="reward-img" src="/images/wechat.jpg">
      <span class="reward-type">微信</span>
    </div>
    
  </div>
</div>
    
<script src="/js/jquery-3.6.0.min.js"></script>
 
<script src="/js/lazyload.min.js"></script>

<!-- Tocbot -->
 
<script src="/js/tocbot.min.js"></script>

<script>
  tocbot.init({
    tocSelector: ".tocbot",
    contentSelector: ".article-entry",
    headingSelector: "h1, h2, h3, h4, h5, h6",
    hasInnerContainers: true,
    scrollSmooth: true,
    scrollContainer: "main",
    positionFixedSelector: ".tocbot",
    positionFixedClass: "is-position-fixed",
    fixedSidebarOffset: "auto",
  });
</script>

<script src="https://cdn.staticfile.org/jquery-modal/0.9.2/jquery.modal.min.js"></script>
<link
  rel="stylesheet"
  href="https://cdn.staticfile.org/jquery-modal/0.9.2/jquery.modal.min.css"
/>
<script src="https://cdn.staticfile.org/justifiedGallery/3.8.1/js/jquery.justifiedGallery.min.js"></script>

<script src="/dist/main.js"></script>

<!-- ImageViewer -->
 <!-- Root element of PhotoSwipe. Must have class pswp. -->
<div class="pswp" tabindex="-1" role="dialog" aria-hidden="true">

    <!-- Background of PhotoSwipe. 
         It's a separate element as animating opacity is faster than rgba(). -->
    <div class="pswp__bg"></div>

    <!-- Slides wrapper with overflow:hidden. -->
    <div class="pswp__scroll-wrap">

        <!-- Container that holds slides. 
            PhotoSwipe keeps only 3 of them in the DOM to save memory.
            Don't modify these 3 pswp__item elements, data is added later on. -->
        <div class="pswp__container">
            <div class="pswp__item"></div>
            <div class="pswp__item"></div>
            <div class="pswp__item"></div>
        </div>

        <!-- Default (PhotoSwipeUI_Default) interface on top of sliding area. Can be changed. -->
        <div class="pswp__ui pswp__ui--hidden">

            <div class="pswp__top-bar">

                <!--  Controls are self-explanatory. Order can be changed. -->

                <div class="pswp__counter"></div>

                <button class="pswp__button pswp__button--close" title="Close (Esc)"></button>

                <button class="pswp__button pswp__button--share" style="display:none" title="Share"></button>

                <button class="pswp__button pswp__button--fs" title="Toggle fullscreen"></button>

                <button class="pswp__button pswp__button--zoom" title="Zoom in/out"></button>

                <!-- Preloader demo http://codepen.io/dimsemenov/pen/yyBWoR -->
                <!-- element will get class pswp__preloader--active when preloader is running -->
                <div class="pswp__preloader">
                    <div class="pswp__preloader__icn">
                        <div class="pswp__preloader__cut">
                            <div class="pswp__preloader__donut"></div>
                        </div>
                    </div>
                </div>
            </div>

            <div class="pswp__share-modal pswp__share-modal--hidden pswp__single-tap">
                <div class="pswp__share-tooltip"></div>
            </div>

            <button class="pswp__button pswp__button--arrow--left" title="Previous (arrow left)">
            </button>

            <button class="pswp__button pswp__button--arrow--right" title="Next (arrow right)">
            </button>

            <div class="pswp__caption">
                <div class="pswp__caption__center"></div>
            </div>

        </div>

    </div>

</div>

<link rel="stylesheet" href="https://cdn.staticfile.org/photoswipe/4.1.3/photoswipe.min.css">
<link rel="stylesheet" href="https://cdn.staticfile.org/photoswipe/4.1.3/default-skin/default-skin.min.css">
<script src="https://cdn.staticfile.org/photoswipe/4.1.3/photoswipe.min.js"></script>
<script src="https://cdn.staticfile.org/photoswipe/4.1.3/photoswipe-ui-default.min.js"></script>

<script>
    function viewer_init() {
        let pswpElement = document.querySelectorAll('.pswp')[0];
        let $imgArr = document.querySelectorAll(('.article-entry img:not(.reward-img)'))

        $imgArr.forEach(($em, i) => {
            $em.onclick = () => {
                // slider展开状态
                // todo: 这样不好，后面改成状态
                if (document.querySelector('.left-col.show')) return
                let items = []
                $imgArr.forEach(($em2, i2) => {
                    let img = $em2.getAttribute('data-idx', i2)
                    let src = $em2.getAttribute('data-target') || $em2.getAttribute('src')
                    let title = $em2.getAttribute('alt')
                    // 获得原图尺寸
                    const image = new Image()
                    image.src = src
                    items.push({
                        src: src,
                        w: image.width || $em2.width,
                        h: image.height || $em2.height,
                        title: title
                    })
                })
                var gallery = new PhotoSwipe(pswpElement, PhotoSwipeUI_Default, items, {
                    index: parseInt(i)
                });
                gallery.init()
            }
        })
    }
    viewer_init()
</script> 
<!-- MathJax -->

<!-- Katex -->

<!-- busuanzi  -->
 
<script src="/js/busuanzi-2.3.pure.min.js"></script>
 
<!-- ClickLove -->

<!-- ClickBoom1 -->

<!-- ClickBoom2 -->

<!-- CodeCopy -->
 
<link rel="stylesheet" href="/css/clipboard.css">
 <script src="https://cdn.staticfile.org/clipboard.js/2.0.10/clipboard.min.js"></script>
<script>
  function wait(callback, seconds) {
    var timelag = null;
    timelag = window.setTimeout(callback, seconds);
  }
  !function (e, t, a) {
    var initCopyCode = function(){
      var copyHtml = '';
      copyHtml += '<button class="btn-copy" data-clipboard-snippet="">';
      copyHtml += '<i class="ri-file-copy-2-line"></i><span>COPY</span>';
      copyHtml += '</button>';
      $(".highlight .code pre").before(copyHtml);
      $(".article pre code").before(copyHtml);
      var clipboard = new ClipboardJS('.btn-copy', {
        target: function(trigger) {
          return trigger.nextElementSibling;
        }
      });
      clipboard.on('success', function(e) {
        let $btn = $(e.trigger);
        $btn.addClass('copied');
        let $icon = $($btn.find('i'));
        $icon.removeClass('ri-file-copy-2-line');
        $icon.addClass('ri-checkbox-circle-line');
        let $span = $($btn.find('span'));
        $span[0].innerText = 'COPIED';
        
        wait(function () { // 等待两秒钟后恢复
          $icon.removeClass('ri-checkbox-circle-line');
          $icon.addClass('ri-file-copy-2-line');
          $span[0].innerText = 'COPY';
        }, 2000);
      });
      clipboard.on('error', function(e) {
        e.clearSelection();
        let $btn = $(e.trigger);
        $btn.addClass('copy-failed');
        let $icon = $($btn.find('i'));
        $icon.removeClass('ri-file-copy-2-line');
        $icon.addClass('ri-time-line');
        let $span = $($btn.find('span'));
        $span[0].innerText = 'COPY FAILED';
        
        wait(function () { // 等待两秒钟后恢复
          $icon.removeClass('ri-time-line');
          $icon.addClass('ri-file-copy-2-line');
          $span[0].innerText = 'COPY';
        }, 2000);
      });
    }
    initCopyCode();
  }(window, document);
</script>
 
<!-- CanvasBackground -->

<script>
  if (window.mermaid) {
    mermaid.initialize({ theme: "forest" });
  }
</script>


    
    

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